Pass through the exit code of post-checkout

This is my attempt to revive an old discussion
[https://public-inbox.org/git/[email protected]/]
(related to this StackOverflow thread
[https://stackoverflow.com/questions/25561485/git-rebase-i-with-squash-cannot-detach-head]
).

useful for "git checkout" to fail when the post-checkout hook fails, or would it be better for it to e.g. simply print a message and exit with status 0?

To answer Jonathan's question, at long last, yes, it is useful. A hook is not only an opportunity to run code at given points in Git's life cycle, but also an opportunity to stop Git in its tracks. Further, if you script the operation, it may very well be useful to discern between an exit code from Git's operation from an exit code produced by your hook.

If you don't want your git checkout/git switch/git restore to fail due to a post-checkout failure, just make sure that that hook does not fail ;-) (This could easily be achieved by trap EXIT { exit 0; }, I believe.

I discovered, however, that the original patch contribution missed that a git checkout -b <branch> will not pass through the exit code, but instead return exit code 1. As part of my contribution, I fix this, and also introduce a regression test to document the now-consistent behavior.

Johannes Schindelin (1):
switch/restore: consistently pass through exit code of post-checkout

 Documentation/githooks.txt    | 3 ++-
 builtin/checkout.c            | 8 +++++---
 t/t5403-post-checkout-hook.sh | 9 +++++++++
 3 files changed, 16 insertions(+), 4 deletions(-)

base-commit: 70bf0b755af4d1e66da25b7805cac0e481a082e4
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-385%2Fdscho%2Fpost-checkout-hook-exit-code-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-385/dscho/post-checkout-hook-exit-code-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/385

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